asp.net 开发 sql server 转 oracle
using System;using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OracleClient;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace TransplantSQL
{
public partial>
{
public static string OracleConnectionString = System.Configuration.ConfigurationSettings.AppSettings["OracleConnectionString"];
public static string SqlServerConnectionString = System.Configuration.ConfigurationSettings.AppSettings["SqlServerConnectionString"];
public Form1()
{
InitializeComponent();
}
private void button2_Click(object sender, EventArgs e)
{
OracleConnection con = new OracleConnection(OracleConnectionString);
try
{
con.Open();
if (con.State == System.Data.ConnectionState.Open)
{
label5.Text = "连接成功";
}
}
catch (OracleException se)
{
label5.Text = "连接失败";
}
finally
{
con.Close();
}
}
private void button3_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(SqlServerConnectionString);
try
{
con.Open();
if (con.State == System.Data.ConnectionState.Open)
{
label4.Text = "连接成功";
}
}
catch (SqlException se)
{
label4.Text = "连接失败";
}
finally
{
con.Close();
}
}
private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
DataTable tablenames = GetTableNames();
foreach (DataRow item in tablenames.Rows)
{
string tablename = item["Name"].ToString().ToUpper();
setdata(tablename);
}
}
else
{
setdata(textBox1.Text);
}
label2.Text = "成功";
}
private static void setdata(string tablename)
{
// 查找有没有此表 如果没有就加
int et = Convert.ToInt32(GetSingle("select count(*) from user_tables where table_name = '" + tablename + "'"));
if (et <= 0)
{
DataTable tableInfo = GetTableInfo(tablename);
string addtablesql = "CREATE TABLE {0}({1})";
string cs = string.Empty;
string biaoshi = string.Empty;
foreach (DataRow citem in tableInfo.Rows)
{
cs += citem["字段名"].ToString();
if (citem["类型"].ToString() == "int" || citem["类型"].ToString() == "bit" || citem["类型"].ToString() == "decimal")
{
cs += " NUMBER(" + (Convert.ToInt32(citem["长度"]) > 38 ? 38 : Convert.ToInt32(citem["长度"])) + (Convert.ToInt32(citem["小数位数"])>0?(","+Convert.ToInt32(citem["小数位数"])):"") + ")";
}
else if (citem["类型"].ToString() == "nvarchar" || citem["类型"].ToString() == "float")
{
cs += " VARCHAR2(" + (Convert.ToInt32(citem["长度"]) == -1 ? 4000 : Convert.ToInt32(citem["长度"]) * 2) + ")";
}
else if (citem["类型"].ToString() == "datetime")
{
cs += " DATE";
}
cs += citem["主键"].ToString() == "1" ? " primary key " : "";
if (citem["标识"].ToString() == "1")
{
biaoshi = citem["字段名"].ToString();
}
cs += citem["默认值"].ToString() != "" ? " default " + citem["默认值"].ToString() + " " : "";
cs += citem["允许空"].ToString() == "1" ? "," : " NOT NULL,";
}
cs = cs.Substring(0, cs.Length - 1);
string tempsql = string.Format(addtablesql, tablename, cs);
GetSingle(tempsql);
if (biaoshi != string.Empty)
{
#region 判断是否有序列号 没有就创建 就是自动标识
int xuliehao = 0;
try
{
xuliehao = Convert.ToInt32(GetSingle(string.Format(@"select Seq_{0}.nextval from sys.dual", tablename)));
}
catch { }
if (xuliehao <= 0)
{
#region 为了让序列不重复 取最大值为min 值
int max = Convert.ToInt32(GetSingle(string.Format("select max({1}) from {0}", tablename, biaoshi),null));
#endregion
string sequence = string.Format(@"create sequence Seq_{0} start with {1}increment by 1nomaxvalue minvalue 1 nocyclenocache", tablename, (max+1));//创建标识
GetSingle(sequence);
}
#endregion
#region 创建序列的触发器
string chufaqisql = string.Format(@"CREATE OR REPLACE TRIGGER T_{0}
BEFORE INSERT ON {0} FOR EACH ROW WHEN (new.{1} is null)
begin
select Seq_{0}.nextval into:new.{1} from dual;
end;", tablename, biaoshi);//创建触发器
GetSingle(chufaqisql);
#endregion
#region 创建唯一约束
//string weiyisql = string.Format(@"create unique index U_{0} on {0} ({1})", tablename, biaoshi);
//GetSingle(weiyisql);
#endregion
}
//int count = Convert.ToInt32(GetSingle("SELECT count(1) FROM " + tablename));
//if (count < 10000)
//{
DataSet ds = Query("SELECT * FROM " + tablename);
DataTable dt = ds.Tables;
string columnsNames = string.Empty;
string values = string.Empty;
for (int i = 0; i < dt.Columns.Count; i++)
{
columnsNames += dt.Columns.ColumnName + ",";
}
columnsNames = columnsNames.Substring(0, columnsNames.Length - 1);
foreach (DataRow dr in dt.Rows)
{
values = string.Empty;
for (int i = 0; i < dt.Columns.Count; i++)
{
if (dr != DBNull.Value)
{
if (dr.ToString() != "")
{
if (dt.Columns.DataType == Type.GetType("System.Double")
|| dt.Columns.DataType == Type.GetType("System.Decimal")
|| dt.Columns.DataType == Type.GetType("System.Int32"))
{
values += dr + ",";
}
else if (dt.Columns.DataType == Type.GetType("System.String"))
{
values += "'" + dr.ToString().Replace('\'', '‘') + "',";
}
else if (dt.Columns.DataType == Type.GetType("System.DateTime"))
{
values += "to_date('" + dr + "','YYYY/MM/DD HH24:MI:SS'),";
}
else if (dt.Columns.DataType == Type.GetType("System.Boolean"))
{
if (dr.ToString() == "False")
{
values += "0,";
}
else { values += "1,"; }
}
}
else
{
values += "chr(32),";
}
}
else
{
values += "NULL,";
}
}
values = values.Substring(0, values.Length - 1);
string osql = "Insert into " + tablename + "(" + columnsNames + ") values(" + values + ")";
GetSingle(osql);
}
//}
}
}
private static DataTable GetTableNames()
{
string sql = string.Format(@"SELECT Name FROM SysObjects Where XType='U' ORDER BY Name");
DataSet ds = Query(sql);
return ds.Tables;
}
private static DataTable GetTableInfo(string tableName)
{
string sql = string.Format(@"SELECT (case when a.colorder=1 then d.name else null end) 表名,
a.colorder 字段序号,a.name 字段名,
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '1'else '' end) 标识,
(case when (SELECT count(*) FROM sysobjects
WHERE (name in (SELECT name FROM sysindexes
WHERE (id = a.id) AND (indid in
(SELECT indid FROM sysindexkeys
WHERE (id = a.id) AND (colid in
(SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name)))))))
AND (xtype = 'PK'))>0 then '1' else '' end) 主键,b.name 类型,a.length 占用字节数,
COLUMNPROPERTY(a.id,a.name,'PRECISION') as 长度,
isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小数位数,(case when a.isnullable=1 then '1'else '' end) 允许空,
REPLACE(REPLACE(isnull(e.text,''),'(',''),')','') 默认值,isnull(g., ' ') AS [说明]
FROMsyscolumns a
left join systypes b on a.xtype=b.xusertype
inner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties'
left join syscomments e on a.cdefault=e.id
left join sys.extended_properties g on a.id=g.major_id AND a.colid=g.minor_id
left join sys.extended_properties f on d.id=f.class and f.minor_id=0
where b.name is not null
And d.name='{0}'
order by a.id,a.colorder", tableName);
DataSet ds = Query(sql);
return ds.Tables;
}
public static DataSet Query(string SQLString)
{
using (SqlConnection connection = new SqlConnection(SqlServerConnectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
}
catch (System.Data.SqlClient.SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
public static object GetSingle(string SQLString)
{
using (OracleConnection connection = new OracleConnection(OracleConnectionString))
{
using (OracleCommand cmd = new OracleCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, null);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (OracleException e)
{
throw e;
}
}
}
}
private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (OracleParameter parameter in cmdParms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
}
public static object GetSingle(string SQLString, params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(SqlServerConnectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (System.Data.SqlClient.SqlException e)
{
throw e;
}
}
}
}
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parameter in cmdParms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
}
}
}
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